The Los Angeles Times regularly reports the air quality index for various areas of Southern California. A sample of air quality index values for Pomona provided the following data: , , , , , , , , and . a. Compute the range and interquartile range. Range Interquartile range b. Compute the sample mean, sample variance, and sample standard deviation (to 2 decimals). Sample mean Sample variance Sample standard deviation c. A sample of air quality index readings for Anaheim provided a sample mean of , a sample variance of , and a sample standard deviation of . What comparisons can you make between the air quality in Pomona and that in Anaheim on the basis of these descriptive statistics